(defun void-function (param) 


  (let* ((class (jclass "Main")) 

	(intclass (jclass "int")) 
        (method (jmethod class "addTwoNumbers" intclass intclass)) 
        (result (jcall method param 2 4))) 
	(format t "in void-function, result of calling addTwoNumbers(2, 4): ~a~%" result)))